package com.atguigu.cloudalibaba.controller;

import com.alibaba.csp.sentinel.annotation.SentinelResource;
import com.alibaba.csp.sentinel.slots.block.BlockException;
import com.atguigu.cloudalibaba.service.PaymentService;
import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;

@RestController
public class CircleBreakerController {

    private final String providerUrl = "http://nacos-cluster-payment-provider";

    @Resource
    private RestTemplate restTemplate;


    @GetMapping(value = "/consumer/payment/{id}")
    @SentinelResource(value = "consumer/payment",blockHandler = "blockHandler",fallback = "handlerFallback")
    public CommonResult<Payment> paymentSQL(@PathVariable("id") Long id) {

        CommonResult<Payment> result = restTemplate.getForObject(providerUrl + "/payment/" + id, CommonResult.class);
        if (id == 4) {
            throw new IllegalArgumentException ("IllegalArgumentException,非法参数异常....");
        }else if (result.getData() == null) {
            throw new NullPointerException ("NullPointerException,该ID没有对应记录,空指针异常");
        }
        return result;
    }

    public CommonResult handlerFallback(@PathVariable  Long id,Throwable e) {
        Payment payment = new Payment(id,"null");
        return new CommonResult<>(444,"兜底异常handlerFallback,exception内容  "+e.getMessage(),payment);
    }

    public CommonResult blockHandler(@PathVariable  Long id, BlockException blockException) {
        Payment payment = new Payment(id,"null");
        return new CommonResult<>(445,"blockHandler-sentinel限流,无此流水: blockException  "+blockException.getMessage(),payment);
    }



    //==================OpenFeign
    @Resource
    private PaymentService paymentService;

    @SentinelResource(value = "consumer/openfeign",blockHandler = "handler",fallback = "fallback")
    @GetMapping(value = "/consumer/openfeign/{id}")
    public CommonResult<Payment> payment(@PathVariable("id") Long id) {
        if(id == 4) {
            throw new RuntimeException("没有该id");
        }
        return paymentService.paymentSQL(id);
    }

    public CommonResult fallback(@PathVariable  Long id,Throwable e) {

        return new CommonResult<>(444,"fallback");
    }

    public CommonResult handler(@PathVariable  Long id, BlockException blockException) {
        Payment payment = new Payment(id,"null");
        return new CommonResult<>(445,"handler");
    }


}
